what i listed will support your bottom end, to an extent lol. Ive seen a ITR/B20B bottom ALL STOCK gsr head/cams make 170 @ 8000 rpms, all stock. roughly, give or take more or less.. it was years ago
you can "throw" some aftermarket cams in but at a certain point your head will not be able to flow anymore to support the cams, creating a bottleneck from power. i dont know if your understanding it but its the simplest i can put it LOL
EDIT: i found this, http://honda-tech.com/showthread.php?t=2068126, it will give you an idea of whats needed for power. keep in mind whats listed is only the MAJOR components, smaller detail oriented things arent listed and is up to your engine builder. results may vary